Why does Verge (Lyra2REv2) suddenly bump to the top in whattomine from time to time? It doesn't seem to be related to the value of the coin.

If its not the value, it must be the difficulty right? Since only these 2 determine your profits...

Can the difficulty drop for half an hour and raise back up again?

...or is whattomine buggy?

You can thank Zpool, which is twice as worse for mining profitability than nicehash. Like parasites, it will send a massive amount of hashrate to a coin, mine a bunch, and as soon as the difficulty skyrockets it will move to the next coin. Rinse and Repeat. More than likely what is happening is whattomine sees little to no hashrate, which would make the coin very profitable if it stayed that way. I think its also more prominent for Verge because its a multi-algo coin, so probably easier to manipulate.

Hello to everyone!I am a new member on this forum so I would like your opinion on some things if possible.I want to begin mining and I have found different opinions on this subject, regarding GPUs, what to mine, profits and so on....My plan is to mine Eth but I have found that 1080 ti is not the best option for that, Eth is also dropping down on the market, the thing is I want to start making profits ASAP (not in the long run).

Both have same warranty, so which would you prefer as a best buy?(any other suggestion is welcome)

Currently I have I3 2nd generation sandy bridge with 8gbs RAM and 1TB HDD so I wont be building a RIG (lets see how the profits go on this PC with one of the above GPUs)I don't want to waste money for 1080 ti (if not needed) but also I wouldn't want to stay outdated with the RX580.

Unfortunately it is not an attack, it is just a common sense. Having a coin mining average more than others is only possible for a limited time, and until it is being advertised somewhere. As soon as you share it on a busy enough topic, people switch their rig , and the income gets hit to about average.